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DEBUGINF...T-CONFIG(7) Miscellaneous Information Manual DEBUGINF...T-CONFIG(7) NAME debuginfod-client-config - debuginfod client environment variables, cache control files and etc. SYNOPSIS Several environment variables and control files control the behaviour of debuginfod client applications. ENVIRONMENT VARIABLES $TMPDIR This environment variable points to a file system to be used for temporary files. The default is /tmp. $DEBUGINFOD_URLS This environment variable contains a list of URL prefixes for trusted debuginfod instances. Alternate URL prefixes are sepa- rated by space. This environment variable may be set by /etc/profile.d scripts reading /etc/debuginfod/*.urls files. $DEBUGINFOD_CACHE_PATH This environment variable governs the location of the cache where downloaded files and cache-control files are kept. The default directory is chosen based on other environment vari- ables, see below. $DEBUGINFOD_PROGRESS This environment variable governs the default progress function. If set, and if a progressfn is not explicitly set, then the li- brary will configure a default progressfn. This function will append a simple progress message periodically to stderr. The default is no progress function output. $DEBUGINFOD_VERBOSE This environment variable governs the default file descriptor for verbose output. If set, and if a verbose fd is not explic- itly set, then the verbose output will be produced on STDERR_FILENO. $DEBUGINFOD_RETRY_LIMIT This environment variable governs the default limit of retry at- tempts. If a query failed with errno other than ENOENT, will initiate several attempts within the limit. $DEBUGINFOD_TIMEOUT This environment variable governs the download commencing time- out for each debuginfod HTTP connection. A server that fails to provide at least 100K of data within this many seconds is skipped. The default is 90 seconds. (Zero or negative means "no timeout".) $DEBUGINFOD_MAXTIME This environment variable dictates how long the client will wait to complete the download a file found on a server in seconds. It is best used to ensure that a file is downloaded quickly or be rejected. The default is 0 (infinite time). $DEBUGINFOD_MAXSIZE This environment variable dictates the maximum size of a file to download in bytes. This is best used if the user would like to ensure only small files are downloaded. A value of 0 causes no consideration for size, and the client may attempt to download a file of any size. The default is 0 (infinite size). CACHE Before each query, the debuginfod client library checks for a need to clean the cache. If it's time to clean, the library traverses the cache directory and removes downloaded debuginfo-related artifacts and newly empty directories, if they have not been accessed recently. Control files are located directly under the cache directory. They contain simple decimal numbers to set cache-related configuration para- meters. If the files do not exist, the client library creates the files with the default parameter values as content. After each query, the debuginfod client library deposits newly received files into a directory & file that is named based on the build-id. A failed query is also cached by a special file. The naming convention used for these artifacts is deliberately undocumented. $XDG_CACHE_HOME/debuginfod_client/ Default cache directory, if $XDG_CACHE_HOME is set. $HOME/.cache/debuginfod_client/ Default cache directory, if $XDG_CACHE_HOME is not set. $HOME/.debuginfod_client_cache/ Deprecated cache directory, used only if preexisting. cache_clean_interval_s This control file gives the interval between cache cleaning rounds, in seconds. The default is 86400, one day. 0 means "immediately". max_unused_age_s This control file sets how long unaccessed debuginfo-related files are retained, in seconds. The default is 604800, one week. 0 means "immediately". cache_miss_s This control file sets how long to remember a query failure, in seconds. New queries for the same artifacts within this time window are short-circuited (returning an immediate failure in- stead of sending a new query to servers). This accelerates queries that probably would still fail. The default is 600, 10 minutes. 0 means "forget immediately". DEBUGINF...T-CONFIG(7)
NAME | SYNOPSIS | ENVIRONMENT VARIABLES | CACHE
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